Natural-gas burner.



U. E. BUNNER.

NATURAL GAS BURNER.

APPLIUATION FILED JUNE 10,1910.

972,056. Patented Oct. 4, 1910.

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G. E. BUNNER.

NATURAL GAS BURNER.

APPLICATION FILED JUNE 10, 1910.

Patented 0013.4, 1910.

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CHARLES E. RUNNER, OF GRAFTON, WESEfi VIRGINIA.

NATURAL-GAS BUR/NEIL Specification of Letters Patent.

Application filed. June 10:, 1910. Serial No. 566,210.

To all whom it may concern:

Be it known that I, CnAnLns E. BUNNER,-

a citizen of the United States, residing at Grafton, in the county of llaylor and State of West Virginia, have invented new and useful Improvements in Natural-Gas Burners, of which the following is a specification;

This invention relates to gas burners of that type which mixes the gas with air be fore the gas reaches the combustion chamber of the furnace or boiler.

The invention has for its principal object to provide an. improved air-regulating and mixing device for burners oi this character so that complete combustion can be produced.

Another object of the invention is to improve and simplify the construction and operation. of devices of this character so as to be comparatively simple and inexpensive to manufacture, reliable and ellicient in use and readily manipulated.

With these objects in view and others, as will appear. as the description proceeds the invention comprises the various novel fea tures of construction and arrangement oiarts which will be more fully described hereinafter and set forth with. particularity in the claims appended hereto.

In the accomymnying drawings, which illustrate one embodiment of the invention, Figure 1 is a perspective view of the device. Fig. 2 is a longitudinal. section thereof.

Fig 3 is a View of th inlet end of theburner. Fig. 4C is a. transverse section on line 4-4:, Fig. 2.

Similar reference characters are employed to designate corresponding parts througlv out the views.

Referring to the drawings, A designates the tubular body of the burner that has one end expanded into a flaring mouth 1 into which air is admitted. a conical head 2 which is fastened by bolts 3 to the mouth end of the body A, and in this head are spiral air-admitting openings 4: which begin adjacent the apex of thehend and terminate adjacent. the base thereof, the

said slots increasing in width progressively.

Fitted on and. rotatable around this head is a conical valve 4 which has slots 5 corresponding to those of the head, so that by turning the valve, the slots thereof can to tally or partially register with the openings of the head to control the supply of air to the burner body 'A. The valve can Over the mouth is.

clamped in adjusted position by means of a screw 6 which passes through an arcuate slot 7 in the valve and screws into the body A.

' l atented Oct. 4, .1910.

Extending; longitudinally into the mouth end of the dy A is a gas-conducting tube or pipe 8 which has intermediate its" ends a threaded opening 9 to receive the end 0i. a gas supply pipe-1.0 which asses through an opening 11 in the wall 0% the body at the mouth thereof where the said body is formed with a boss. This pipe is clamped in place by nuts 12, and is adapted to be connected with a suitable source of gas. The pipe 8 terminates about midway of the body A sothat between the end of the pipe and the discharge end of the body, a chainher 13 is provided in which the gas and air are eii'ectively mixed before entering the furnace. Extending longitudinally of the pipe 8, which projects out of the head 2 at the apex thereof, is a tubular stem 1d that has on its inner end a flaring head or deflector 15 that is frusto-conical so that the gas will be discharged into the chamber 13 in the form of a hollow cone, and, by reason of this, it will intercept the current of air passing longitudinally of the body A and thoroughly mix therewith. Surrounding this stem or pipe 14 is a spiral ridge 16 which fits the bore of the pipe 8 so that a helical passage 17 will be formed between the pipes 8 and 14: beginning at a point where the gas enters the pipe 8 and terminating at the de Hector or gas distributor 15. The pipe 8 has an internal bevel 18 at the distributor so as to beparallel with the outersurfac'e of the latter. The pipe orstem 14 is adjustpble longitudinally by means of a hand-tuiined sleeve 19 which is internally threaded to en gage the threads 20 on the outer end of the pipe or stem 14, the said pipe or stem passing through a stuffing box 21 on t-lieoutef end of the pipe 8, the said box being screwed on the latter pipe, and the sleeve has a swivel connection with the stufling box 21 sothat the turning of the sleeve will cause longitudine] movement of the stem '14 to vary the outlet area for the gas between the deflector into and through the pipe by the injector action of the gas discharged throughthe burner bddy. A burner of this character can be correctlyadjusted so as to proportion the supply of air to the gas for obtalning the best combustion, and the burner can be readily taken apart and assembled when required.

From the foregoing description, takenin connection with the accompanying drawings, the advanta es of the construction and of the method 0 operation will be readily apparent to those skilled in the art to which the invention appertains, and while I have described the principle of operation of the invention, together with the apparatus which I now consider to be'the best embodiment thereof, I desire to have it understood that the apparatus shown is merely illustrative, and that such changes may be made when-desired as are within the scope of the claims appended hereto.

Having thus described the invention, what I claim, is

1. A burner of the class described com- 7 prising a tubular body open at one end, a

'tra nsversely into the b0 conical head on theinlet end of the body, said head having air inlet ports, a conical valve rotatably mounted on the head and having inlet ports adapted to be moved into or out of register with the ports of the head, a centrally-disposed longitudinally-extending pipe terminating within-the said body, means for connecting the pipe with a source of gas, means for imparting a whirl to the gas while in the said pipe, and a deflector or distributing the gas into the alr passing through the said body.

2. A burner comprising a tubular body having a flarin mouth .or inlet end, a head fastened over t e inlet end and having airinlet ports, means for opening and closing the said p'orts, a pipe extending iongitudinally throu h the body and extending out of the heacfi a gas sup ly pipe extendin dy at the inlet en. thereof and secured to the first-mentioned pipe to s11 plygas thereto and to support the pipe 1i i ly in place, an element extending long itu inally through the first-mentioned pipe and of'less diameter than the bore of the 'latter,;mean's between the elementand the surrounding pipe to form a spiral passage for the gas to pass into the burner, a deflector on the said element for distributing the gas outwardly toward the body of the burner, and means for discharging air axially into the-said body.

3. A burner comprising a tubularbody having a flaring mouth or inlet end, a head fastened over the inlet end and having air inlet ports, means for opening and closing the said ports, a pipe extending longitudinally thumb the body and extending out of the heaf, a transversely into the b0 y at the inlet end thereof-and secured to the first-mentioned pipe to supply gas thereto and to support gas supply pipe extending the pipe rigidly in place, an element extending longitudinally throu h the first-men tioned plpe and of less iameter than the ,bore of the latter, means between the ele ment and the surrounding pipe to form a spiral passage for the as to ass into the burner, a deflector on t e sai distributing the gas outwardly toward the body of the burner, said element being hollow from one end to the other to admit air to the said body in the axial region thereof, and means for longitudinally adi'usting the element to control the gas supp y through the said passage.

4-. A burner comprising a body open at one end to receive air-and open at the opposite end to deliver a mixture of gas and air. a pipe extending longitudinally into thesaid body from the inlet end thereot and terminating short of the discharge end to provide an intermediate mixing chamber, a pipe extending longitudinally of the firsbmen tioned pipe and of less diameter than the latter, means between the pipes for forming a spiral passage, means for discharging gas through the said assage, astuifing box on the'first-mention pipe and through which the second-mentioned pipe extends threads on the sebond-mentioned pipe, a s eeve engaging the threads, a swivel joint between the said sleeve and stuffing box to prevent longitudinal movement of the sleeve as the same is rotated to move the second pipe longitudinally, a deflector on the inner end. of the said movable pipe cotiperating with the inner end of the first-mentloned pipe to vary the effective outlet area for the gas, controllable means for admitting air to the burner body ata point-behind the gas, and means for supplying air to the said mixing chamber through the second pipe.

5. A burner comprising a body open at one end to receive air and open at the opposite end to deliver a mixture ofgas and air, a pipe extending longitudinally into the said body from the inlet end thereof and ter minating short of the discharge end to provide an intermediate mixing chamber, a pipe extending longitudinally of the firstmentioned pipe and of less diameter than the latter, means between the ipes for form- 'gas through the said passage, a st .fiing box on the first-mentioned pipe and throu h which the second-mentioned pipe exten s, threads on the secondmentioned pipe, a sleeve engaging the threads, a swivel joint between the said sleeve and stuffing box to prevent longitudinal movement of the sleeve as the same 1s rotated to move the second pipe longitudinally, a deflector on the inner end element forv ing a spiral passage, means or di: .iharging of the said movable ipe cotiperating with the inner end of the rstementione'd pipe'to .vary the effective outletarea for the gas, a comcalhead extending over-the inlet end of the body and having an o to receive the outer en tioned pi a conica ening at its vertex of the first-mene, said head having air inlet ports, valve rotatably mounted on the head for openin%1 and closing the said ports,

andmeans on e outer end of the secondmentioned pipe for admitting air thereto.

In testimony whereof I affix my sigriature in presence of two witnesses.

CHARLES E. BUNEER. Y-Vitnessesy JOHN L. ROBINSON,- LEE BENNETT. 

